Sound-reproducer.



Pa tented Sept. 9, I902.

.H. a. A. WIEDER.

SOUND BEPBODUCEB. (Application filed Sept. 21, 190x) (No Model.)

I mmour THE Nomus PETERS COJPNOTO-LITMCL, WASHINGTON, n. c.

ITED STATES ATENT FEIcE.

HENRY GEORGE A. I. WIEDER, OF LoNDoN, ENGLAND, ASSIGNOR TO CHARLESWILLIAM PHILLIPS, or LONDON, E GLAND.

SOUNDREPRODUCER.

SPECIFICATION forming part of Letters Patent No. 708,849, datedSeptember 9, 1902.

Application filed September 2 1, 190 1. $eria1No. 76,108. (No model.)

To all 1U77/0777/ it may concerm Be it known that I, HENRY GEORGE ABRA-HAM IsAAo WIEDER',a subject'of the Emperor of Austria-Hungary,whosepost-office address is Victoria street, Westminster, London,England,haveinvented a certain new and useful Improvement inSound-Reproducers, of which the following is a specification, such aswill enable others skilled in the art to which it appertains to make anduse the same.

The object of myinvention is to provide a recording and reproducingdevice for phonographs and instruments of like character for thereproduction of sounds of such construccured to the outer side of suchcoil, a like coil secured upon the outer side of the second disk, athird disk secured upon the outer side of the second coil, a cone,preferably hollow, secured at the base to the outer side of the thirddisk, a reproducing or recording point of suitable material secured inthe paper of the cone, and a sound-conducting channel in communinicationwith the rear of the first disk or diaphragm. It is not to be understoodthat my said invention is limited to a device comprising at once all ofsaid devices and parts, as the same consists of the particularconstruction of certain devices and parts and the particular combinationand arrangement of certain devices and parts, all as hereinafter more,particularly set forth in the description of this specification andpointed out in the claims.

I will now describe the invention with reference to the accompanyingdrawings, in which-- Figure 1 shows a sectional View of the instrumentwith the cone and conducting-tube. Fig. 2 shows a plan View of the samefrom a is a small hollow metal cone having a sap- I phire-point whichtouches the record.

(7 b b are three glass disks, the lower of which is conected to the conea and the upper faces the perforated vulcanite disk. I

c c are two series of rays of wire, (preferably aluminiunn) one of whichis placed between each of the three glass disks and which are cementedthereto.

01 d are two rubber Washers, one of which is placed on each side of thelarger glass disk.

e is a perforated vulcanite disk which breaks thesou-nd-waves.

f is a'thin metal back or disk with central aperture opening to theconducting-tube h.

g is an annular rim or ring of L-section which screws onto the vulcanitedisk 6 and connects the glass disks thereto.

h is the conducting-tube which can be attached to the usual funnelshaped trumpet.

The operation of the instrument is as follows: The vibrations caused bycontact of the point with a rotating cylindrical record or bysound-waves impinging on the cone are transmitted by contact to thesmaller glass disk,and thence pass through the wire rays totheintermediate disk, and again through the wire rays on to the largestglass disk, where they arrive in a magnified condition, and are thentransmitted by vibration to the air contained in the inclosed spacebetween the large glass disk and the vulcanite disk, where they arebroken up by having to pass through a number of holes in the vulcanitedisk, and they then proceed to the second inclosed space between thevulcanite disk and the metal back, and thence they pass in a clear,resonant, and human tone of voice through the conductingtube to thetrumpet. The action of passing in this way through the reproducerremoves all rasping metallic sounds and brings out in perfection thedifficult low or high sounds in a natural manner and withaperfectionwhich all other mechanical speakers have failed to accomplish.

I claim 1. In a device of the class described, the combination one withthe other of three disks of different diameters concentricallyinterposed one upon the other and separated from each other by wiresradiating from the common center thereof, substantially as shown anddescribed and for the purpose set forth.

2. In a device of the class described, the combination one with theother of three disks of different diameters concentrically interposedone upon the other and separated from each other by wires radiating fromthe common center thereof and a recording or reproducing point securedto the outermost disk, substantially as shown and described.

3. In a device of the class described, the combination one with theother of three disks of resilient material of different diametersconcentrically interposed upon each other, and separated from each otherby wires radiating from the common center thereof, and a cone providedat the point with a recording or reproducing point, the base of whichcone is secured to the outer disk, substantially as shown and described.

4. In a device of the class described, the combination with three disksof resilient n1aterial interposed concentrically upon each other so thattheir centers are coincident, of

a recording or reproducing point carried by the outermost disk, wiresradiating from the common center interposed between the disks, a casingsupporting the periphery of the innermost disks, and a perforated backplate securing such disk therein, substantially as shown and described.

5. In a device of the class described, the combination one with theother of a cone a, the concentrically-arranged glass disk I) separatedby the Wires 0 and cemented thereto, the perforated vulcanite disk 6,and the metal backf connected by the inclosing rim 9, substantially asshown and described.

6. In a device of the class described, the combination one with theother of a cone a, the concentrically-arranged glass disks 1) ofdiiferent diameters separated by the wires 0 and cemented thereto, theperforated vulcanite disk 6, and the metal backfconnected by theinclosing rim (7, substantially as shown and described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

HENRY GEORGE A. I. WIEDER.

\Vitnesses:

SAMUEL S. BROMHEAD, HENRY FAIRBROTHER.

